Relay device for electric circuits.



0. A. PALMGRBN. RELAY DEVIGE FOR ELEGTRIG GIRGUITS. AAAAAAAAAAAAAAAAAAAAAAAAAA 7.

Patented Apr. 20, 1909.

To all whom it may concern:

GARL PALMGREN, OF CHCAGO, ILLINOIS.

RELA'? DEVIOE FOR Emo'ruc cmcnrs.

No. 919,0ee.

specifica ton oflLetters Patent.

Patented April 20, 1909.

Be it known'that I, CARL A. PALMGREN, of Chicago, Cook county, Illinois, have invented a new and useful Relaf Device for Electric Circuits, ofwhich the; allowing is a full, clear, and exact description, reference being had to the accom anying drawings, forming part of this speci cation, in which Figure 1 is a front elevation of a relay device embodying'm invention; and Fig. 2 is a section on the ine II-II of Fig. 1.

My invention has' relation to.' the 'class of relays, andis designed to provide a relay device which is particularly'adapted for use where the circuit controlled therebyis re: quired to carry a comparatively heavy current, my Object being to provide a relay having its circuit controllng .contacts so arranged as to be separsted in such a manner when the circuit is open as to i revent the maintenance of tacts. V

With this Object in view, my invention consists in the novel construction, arrangenent and combination of parts, all substantially, as hereinafter described.

Referring to the accompanying drawing's,

.2 designates the coils of the relay nagnets which are connected in the local circuit 3 in the usual manner, and which are provided with the pole pieces 4.

5 designates an armature which is carried by the short arn of a lever 6' ivotedat 7 in a suitable supporting brac et 8. The longer arm of this lever carries at its free end portion a transverse arn 9, at each end portion of which is a contact or clectrode 10 of carbon or other suitable material. These two contacts 10 are arranged to; coperate with two fixed contacts 11 which are carried by the terminal pieces 12 to which are connected the wires 13 of the'circuit to be controlled" by the relay. V V i 14 designates a sringwhich is connected' at one end by an a justable screw 15 to the base or support 16 of the instrument, and at its other end' to the short arin of the lever 6. The-screw 15 rov'ides means for adj ustin g the tension of t mally held or balanced in the open position shown in full lines in Fig. 2.

17 is an adjustable stop for the leve'r 6 arcs between te'con ie spring' 14, so that the lever 6 with its armature and contacts will be nor-' When the magnet coils 2 are energized by the local circuit 3, thearmaturle 5`is attracted by the poles 4, thereby actuating the lever 6 to bring the contacts 10 and 1.1 together. Assoon as the circuit is broken inthe coils 2, the spring l l auses the 'contacts to immedi ately-separate, and they are heldseparatel to such anextent as to prevent any possi bility of current junp'ing from one to the other, or of arcs being maintained between" them.

The advantages of my invention result from the use of the combined armature and contact carryin le'ver having contacts'on its. long arm, 'toget er with the spring arranged to separate said contacts When the armatu re is released by the relay magnets, and to hold such contacts in such widely separated position as to prevent the maintenance of an electric circuit between them.

Various changes may be made inthe dea tails of the construction and arrangement'of the various parts by those skilled in the art, without 'de arting from my invention,,since What I c aim is In a relay device, a base,. a maget supported on a b'acket secured to the base, a

ever having a sho'r't and a long arn, a shaft to which thelever is secured, brackets secured to the base having adjustable center bearings in which the lever shaft is journ'aled, an armature bar secured to the short arm of the lever, a contact bar having a contact at each end carried by the log'arm of the lev'er, contact brackets each provided With a binding post and a contact secured to the base, the contacts on the bracke'ts coperating with the contacts upon the contact arm to complete a circuit between the binding osts when in contact with each other, a Wire eading to each of the binding' posts, wires leading to and from the nagnct, an adjustable stop for the pivoted lever, and an adjnstable ,tension spring to separate the contacts when the nagnet 'is denergzed; described.

In testimony whereof, l have hcreunt-o set my hand.

substantially as CARL A. PALMG RFN Witnesse,

W. E. boGER, H. E. CULLEN. 

